Software Engineer III - Frontend

An Introduction to Primer

We’re the world's first unified payment infrastructure, empowering businesses worldwide to unleash their payment potential. By choosing our platform, merchants can take control over their payment stack, create unique commerce experiences, accelerate their roadmap and increase payment success. We strive to make something complex, incredibly simple and intuitive. The world's top investors, including Accel, Balderton, Iconiq, and Tencent, have invested in Primer's vision to rebuild payments and commerce from the ground up.

Join us in shaping the future of payments and commerce.

Which team will you be joining?

Our Partners team is reimagining how we enable third party payment service providers to unlock the power of Primer’s unified payment infrastructure, providing a scalable and flexible platform for growth.

Reporting to an Engineering Manager, you’ll join a team of backend, frontend and mobile engineers all working together alongside our Product team.

The team adopts a ‘you build it, you own it’ approach, working with infrastructure, doing their own testing and QA.

Our tech stack includes: Python, Typescript, React, Swift, Kotlin, AWS, Kubernetes and Terraform, amongst lots of other things.

🔍 What will you be doing?

• Designing and implementing high-quality, performant, and scalable frontend interfaces using TypeScript and React
• Collaborating closely with product, design, and backend teams to bring new features and products to life
• Building and maintaining reusable components, SDKs, and internal tools that empower both customers and third-party developers
• Involved in architectural and technical decisions on the frontend
• Driving and applying modern development practices such as TDD and BDD to ensure robust, maintainable code
• Continuously improving performance, accessibility, and usability across our products
• Creating clear internal documentation to support the systems and features you build
• Contributing to and reviewing code, always seeking ways to improve quality and team productivity

👀 What We’d Love To See

• Strong understanding of the entire frontend development lifecycle—from design to deployment
• Expertise in React and TypeScript, with a deep understanding of modern web development best practices
• Experience working with SDKs, building developer-friendly tools, and shaping great integration experiences
• Familiarity with cloud infrastructure, ideally AWS, and understanding of how frontend fits into distributed systems
• A self-starter mindset with a bias for action. You’re comfortable navigating ambiguity and love solving real-world problems
• Excellent communication skills, both written and verbal
• Bonus: Experience in payments, fintech, or building tools for external developers

🚫 You May Not Like It Here If

• You enjoy working in an office-setting, we are remote-first and always will be!
• You are not comfortable with shifting context and navigating ambiguity
• You don’t enjoy testing your code, we have no testers or QA’s here at Primer

PLEASE NOTE: Our engineering teams work fully remotely across Europe but we are focusing our hiring strategy on these locations: UK 🇬🇧, Hungary 🇭🇺, Romania 🇷🇴, Serbia 🇷🇸, Turkey 🇹🇷, Bosnia 🇧🇦, and Greece 🇬🇷.

Unfortunately we are unable to offer sponsorships or relocation packages at this time.

✅ Our interview process

• 30 minute call with a Talent Partner
• 45 minute interview with an Engineering Manager
• 90 minute pair programming interview
• 60 minute final stage values-alignment interview

What’s life like at Primer?

We’ve been recognised as a top global employer, #1 in FinTech for ‘flexibility’!

We’re building a culture where people can come and do their best work and enjoy it. We want our people to be proud of the impact that they have at Primer, and of the work that they are doing. You will be working with a team of people who are mission-driven, smart, and reflective, and who are invested in building exceptional products and delivering success for our merchants (and we also know how to have fun along the way).

We work remotely. We believe that building a successful, profitable company goes beyond proximity. We invest in our relationships with each other through great remote working practices and thoughtfully designed face-to-face time together. Our heads-together time comes in the form of workstations, our annual company retreat, and co-working space access worldwide.

Finally, let’s go ahead and say it. The work that we do is challenging. Startups are a challenge, building category defining products is a challenge. You should be prepared for a challenge at Primer. But, there’s a big difference between a challenge and a struggle. The key difference is that the right challenge comes with the right support structures, an acceptance that not everything always goes to plan, a collaborative environment, and a great team around you. It’s never a challenge that you will face alone.

Our Benefits

🌍 We are fully remote and globally distributed; and have been since day one

💰 Competitive share options

🌴 Uncapped holiday, with 25 days minimum to be taken

🗣️ Co-working space access

📅 Workations & Company Retreat

💻 The best equipment for your role

🏠 £500 towards your home office setup

🔎 Generous learning budget

🏥 Private Medical Insurance

📈 A broad set of additional perks and benefits (depending on location)

Don’t meet every single requirement?

At Primer, we’re dedicated to building a diverse, inclusive, and authentic workplace. If you’re excited about this role but your past experience doesn’t align perfectly with every qualification in the job description, we encourage you to apply. You may be the right candidate for this or other roles. Primer is committed to the equal treatment of all current and prospective employees, regardless of background or beliefs.

Primer adopts a zero-tolerance approach to discrimination. We are committed to providing equal opportunities to all current and prospective employees regardless of age, disability, sex, sexual orientation, pregnancy and maternity, race or ethnicity, religion or belief, gender identity, or marriage and civil partnership.